Up to 08/2009

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1627/82,B1628/82,B1637/82,B1638/82,B1647/82,B1648/82: Lost communication with Side Airbag Sensor LH
B1648/82 - Side Satellite Sensor Bus LH Initialization Incomplete

DESCRIPTION

The side collision sensor LH circuit (to determine deployment of the front seat side airbag assembly LH, rear seat side airbag assembly LH and curtain shield airbag assembly LH) is composed of the center airbag sensor assembly, side airbag sensor LH, and rear airbag sensor LH.

The side airbag sensor LH and rear airbag sensor LH detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the airbag should be deployed.

Theses DTCs are recorded when a malfunction is detected for the side collision sensor LH circuit (to determine deployment of the front seat side airbag assembly LH, rear seat side airbag assembly LH and curtain shield airbag assembly LH).

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK PRESENT DTC

(a) Turn the engine switch on (IG), and wait for at least 60 seconds.

(b) Check for present DTCs DTC Check / Clear.

Result:

HINT
* DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the engine switch off and then to on (IG) again.
* Codes other than DTC B1627, B1628, B1637, B1638, B1647, B1648, and 82 may be output at this time, but they are not related to this check.
E -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

D -- CHECK SIDE AIRBAG SENSOR LH

C -- CHECK CONNECTORS

B -- CHECK CONNECTORS
A -- Continue to next step.

2. CHECK PAST DTC

(a) Turn the engine switch on (IG), and wait for at least 60 seconds.

(b) Check for past DTCs DTC Check / Clear.

Result:

HINT
Codes other than past DTC B1627 and B1637 may be output at this time, but they are not related to this check.

C -- CHECK SIDE AIRBAG SENSOR LH

B -- CHECK CONNECTORS
A -- Continue to next step.

3. CHECK CONNECTORS

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Check that the connectors are properly connected to the center airbag sensor assembly, side airbag sensor LH and rear airbag sensor LH.

OK:

The connectors are properly connected.

HINT
If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

(d) Disconnect the connectors from the center airbag sensor assembly, side airbag sensor LH and rear airbag sensor LH.

(e) Check that the terminals of connectors are not damaged.

OK:

The terminals are not deformed or damaged.

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

4. CHECK NO. 2 FLOOR WIRE (OPEN)

(a) Using SST, connect terminals 24 (BBL+) and 23 (BBL-) of connector B.

NOTICE:
Do not forcibly insert SST into the terminals of the connector when connecting.

SST : 09843-18040

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

5. CHECK NO. 2 FLOOR WIRE (SHORT)

(a) Disconnect SST from connector B.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

6. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)

(a) Connect the cable to the negative (-) battery terminal.

(b) Turn the engine switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Text in Illustration

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

7. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)

(a) Turn the engine switch off.

Text in Illustration

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

8. CHECK NO. 2 FLOOR WIRE (OPEN)

(a) Using SST, connect terminals 2 (BCL+) and 1 (BCL-) of connector C.

Text in Illustration

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

9. CHECK NO. 2 FLOOR WIRE (SHORT)

(a) Disconnect SST from connector C.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

10. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)

(a) Connect the cable to the negative (-) battery terminal.

(b) Turn the engine switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Text in Illustration

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

11. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)

(a) Turn the engine switch off.

Text in Illustration

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

12. CHECK SIDE AIRBAG SENSOR LH

(a) Connect the connectors to the rear airbag sensor LH and center airbag sensor assembly.

(b) Interchange the side airbag sensor RH with LH and connect the connectors to them.

(c) Connect the cable to the negative (-) battery terminal.

(d) Turn the engine switch on (IG), and wait for at least 60 seconds.

(e) Clear the DTCs stored in the the memory DTC Check / Clear.

(f) Turn the engine switch off.

(g) Turn the engine switch on (IG), and wait for at least 60 seconds.

(h) Check for DTCs DTC Check / Clear.

Result:

Text in Illustration

HINT
Codes other than DTC B1623, B1642, B1643, or 81 and B1628, B1647, B1648, or 82 may be output at this time, but they are not related to this check.

C -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

B -- REPLACE SIDE AIRBAG SENSOR LH
A -- Continue to next step.

13. CHECK REAR AIRBAG SENSOR LH

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.

(d) Interchange the rear airbag sensor RH with LH and connect the connectors to them.

(e) Connect the cable to the negative (-) battery terminal.

(f) Turn the engine switch on (IG), and wait for at least 60 seconds.

(g) Clear the DTCs stored in the memory DTC Check / Clear.

(h) Turn the engine switch off.

(i) Turn the engine switch on (IG), and wait for at least 60 seconds.

(j) Check for DTCs DTC Check / Clear.

Result:

Text in Illustration

HINT
Codes other than DTC B1623, B1642, B1643, or 81 and B1628, B1647, B1648, or 82 may be output at this time, but they are not related to this check.

C -- REPLACE REAR AIRBAG SENSOR LH

B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

14. CHECK CONNECTORS

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Check that the connectors are properly connected to the side airbag sensor LH and rear airbag sensor LH.

OK:

The connectors are properly connected.

HINT
If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

(d) Disconnect the connectors from the side airbag sensor LH and rear airbag sensor LH.

(e) Check that the terminals of connectors are not damaged.

OK:

The terminals are not deformed or damaged.

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

15. CHECK NO. 2 FLOOR WIRE (OPEN)

(a) Using SST, connect terminals 2 (BCL+) and 1 (BCL-) of connector C.

Text in Illustration

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

16. CHECK NO. 2 FLOOR WIRE (SHORT)

(a) Disconnect SST from connector C.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

17. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)

(a) Connect the cable to the negative (-) battery terminal.

(b) Turn the engine switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Text in Illustration

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

18. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)

(a) Turn the engine switch off.

Text in Illustration

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

19. CHECK SIDE AIRBAG SENSOR LH

(a) Connect the connector to the rear airbag sensor LH.

Text in Illustration

HINT
Codes other than DTC B1632, B1633, B1637 and B1638 may be output at this time, but they are not related to this check.

C -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

B -- REPLACE SIDE AIRBAG SENSOR LH
A -- Continue to next step.

20. CHECK REAR AIRBAG SENSOR LH

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.

(d) Interchange the rear airbag sensor RH with LH and connect the connectors.

(e) Connect the cable to the negative (-) battery terminal.

(f) Turn the engine switch on (IG), and wait for at least 60 seconds.

(g) Clear the DTCs stored in the the memory DTC Check / Clear.

(h) Turn the engine switch off.

(i) Turn the engine switch on (IG), and wait for at least 60 seconds.

(j) Check for DTCs DTC Check / Clear.

Result:

Text in Illustration

HINT
Codes other than DTC B1632, B1633, B1637 and B1638 may be output at this time, but they are not related to this check.

C -- REPLACE REAR AIRBAG SENSOR LH

B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

21. CHECK SIDE AIRBAG SENSOR LH

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Interchange the side airbag sensor RH with LH and connect the connectors to them.

(d) Connect the cable to the negative (-) battery terminal.

(e) Turn the engine switch on (IG), and wait for at least 60 seconds.

(f) Clear the DTCs stored in the the memory DTC Check / Clear.

(g) Turn the engine switch off.

(h) Turn the engine switch on (IG), and wait for at least 60 seconds.

(i) Check for DTCs DTC Check / Clear.

Result:

Text in Illustration

HINT
Codes other than DTC B1622 and B1627 may be output at this time, but they are not related to this check.

C -- REPLACE SIDE AIRBAG SENSOR LH

B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting